Finding the Fourth Proportional to 1,866.69, 2,575.89 and 1,080.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,866.69 : 2,575.89 = 1,080.59 : x
2. Step 2: Convert to fraction form
   1,866.69/2,575.89 = 1,080.59/x
3. Step 3: Cross multiply
   1,866.69x = 2,575.89 × 1,080.59
4. Step 4: Simplify right side
   1,866.69x = 2,783,468.10
5. Step 5: Solve for x
   x = 2,783,468.10/1,866.69
6. Step 6: Final answer
   x = 1,491.12